Electric brake.



' Patented 061.1618995 6. H, HooPER. 6

ELECTRIC BRAKE.

(Appurmon med Jun'e s, 189s.)

' :,No Model.)

UNITED STATES PATENT OEEICE.-

GEORGE HENRY BINGHAM HOOPER, OF TORONTO, CANADA.

ELEoTei-C BRAKE.

sPECIFIcATIoN forming part of Letters Patent No. 634,666, 'cated october 1o, 1899. Application ned rune 8,1892.' sernino. 682,900. (No moana To all whom, it may con/cern.- t

Be it known that I, GEORGE HENRY BING- HAMHOOPER, ot' the city of Toronto, in the county of York, in `the Province of Ontario,

Canada, have invented certain new and use` will act with the greatest strength upon'the ing a less arc perimeter of the wheel; and it consists, jessentially, of a brake-shoe having the major portion of the than the contacting pole ends which are formed concentric to the center of the wheel to which the brake is applied and extend out1 entirely beyond the wound portion-of the magnetic shoe, the parts being otherwise constructed and arranged in'detail, as hereinafter more particularly explained.

Figure 1 is 'a side elevation showing the application of my. brake to a wheel. l Fig.`2 isaI sectional plan of the brake-shoe and portion 'of the wheel, showing the meanswhereby such brake-,shoe is normally held from contact with the wheel.' v

In the drawings like lettersof reference indicate corresponding parts in each ligure.

A is a wheel having an iron rim and'de'- signed to bea wheel of a car or other vehicle or lines of force are a wheel on a shaft-or any other wheel to which it is necessary to apply' a brake.

B is my brake-shoe comprising a magnet portion B', wound as specific@ and the end contacting pole portions B2. It will be noticed that the pole portions B2 extend outwardly entirely to the outside lof the magnet portion B' and are formed. in arcs concentric to the perimeter of the wheel. The portion B', it will be noticed, is formed on an arc described from a less radius than that of the arcs of lthe' pole ends. By providing outwardlylextending pole ends, as described, the `magnetic allowed a freer passage to the perimeter ofthe Wheel, and being entirely outside of Vthe portion B' there is no danger of shortfcircuiting between the poles,as would be the case if the poles approached each other or were close together.

The magnetic brake-shoe is held in position the jaws f,

magnet formed ona circle hay-5 which Wires are provided at anyconvenient' point with a suitable switch to throw thecurrent into the magnet when desired;

The magnetic shoe'B is held,froni lateral displacement by the hanger F, providedwith between which the shoe fits.

Y In order to hold the shoe positively free of the wheel, I provide an elastic band f', which is passed aroundthe magnet at one end, and a hook f2 on the hanger F at the opposite end.

lt will be seenfrom thisdeseription by the construction'of my brake-shoe that I am able to procure a very much better grip upon the `surface of the wheelv than those heretofore devised of which I am aware.

What I claim as my invention is l. A brake for-Wheels comprising abar-magnet ofnniform cross-section throughout, having 'the wound portion formed on a core, the arc of which is that of a circle less than that of the rirn o. the wheel to which it extends, pole ends extending Aentirely outside such arc and formed on arcs concentric to the perimeter of the Wheel and having their inner arcshaped sides disposed to contact with the wheel, as specified. v

2. A brake for Wheels comprising abar-Inagnet having the Wound portion formed on a core, the arc of which is that of a circle less than the arc 'of the rim of the wheel t'o which it extends, pole ends extending entirely out side such arc and fcrmedon arcs concentric to the perimeter of the wheel and having their inner arc-shaped sides disposed to contact with the wheel, a link supporting the same pivotally connected at'the bottom to the top the arc-shaped pole end thereby leaving the opposite pole end perfectly free and the Vinner sideof both pole ends disposed to con- .tact with Jthe wheel, a rigidly-supported guiding-hanger having the bottom end embracing thecentral portionof the core and limiting its movement, and a suitable spring coll nected to the magnetic brake-shoe at the center and to a'suitable portion of the hanger at the opposite end, as specified.

GEORGEv HENRY -BINGllAll HOOIER. lVitnesses:

B. Born, A; MCADAM.'

ICO 

